Tripping mechanism for platen-presses.



L, E. MORRISON.

TRIPPLNG MECEANISM FOR PLATEN PRESSES.

APPMGATION FILED EEB.14.1913.

2 SHEETS-SHEBT l.

L. E. MRRSG? TBHPING MEGHAHS FOB. PLTE 122.33528,

Annunci; 11.23 fm. ifa, 191s 1,113,676. Panam oca. 13, 1914. I

S EBETS-SEBET 2.-

Wy. 2 i i UNITED S'IA'IES PATENT UFFIE,

LEWS E. MORRISON, 0F NEWARK, NEW JERSEY, ASSIGNOR T0 HEMSELF AND MATTHIAS PLUM, 0F NEWARK, NEVI EERSEY.

TRIEPING MECHANISM FOR PLATEN-PRESSES.

Missie.

v To aZZ whom it may concern.'

Bae it lmown that l, LEWIS E. MORRISON, Va citizen of the United States of America, and a resident of Newark, Essex county, New` Jersey, have invented certain new and 'useful improvements in Tripping Mechanismsvfor Platen-Presses, of which the fob 'lowing is a specification.

sheet, having been printed, fails to be seized by the delivery grippers.

, Other objects will appear as this specification proceeds.

In the drawing illustrating my invention,v Figure l is a side elevation of a platen press equipped with automatic feed and delivery devices and provided with my tripping mechanism, and Fig. 2 is a diagram of the electrical circuits for operating the .difterent elements inthe tripping mechanism.

, The press itself comprises a suitable framework l in which is pivoted the platen 2 while 3 is the form member pivoted at 4. 5 is the main shaft, driven in a Well known'manneg1 and which carries on both sides of the press a crank disk 6 to which connecting rods 7 are pivoted to oscillate the form member.

The platen is pivoted at 8 and oscillates in a Well known manner.

i in the following description details are omitted because either the elements referred to are'fknown to the art in 'general or the specicv elements/and their operation have been described' by', me in pending applications and patents which will befreferred-to as they occur.

in front of the platen there is provided an auxiliary frame 9 on both sides of the press. il. paper table 10 rests on this frame and supports the paper or other matter 11 Specification of Letters Patent.

.Application ed 'February 14, 1913.

Patented Get. i3, 1914. serial ne. 748.327.

to be printed. l employ an automatic sheet separating device for separating the single top sheet from the pile and transfer it to the feed table lwhich feeds the sheet to the platen'. The separating device is described and claimed in detail in my pending application Serial Number 449,421 so only a briefY description is necessary here.

The numeral 12 represents a suction noz- Zlc carried by an arm 13 which is pivoted at 14 to a large lever 15 pivoted at 16 to the frame. There is a lever l5 on each side of the press. The one on the near side is broken ofi for the sake of clearness and only the one on the far side or the right side or" the press carries the suction nozzle arm 13. T he two levers l5 are connected at their lovver ends by a rod 17 and are oscillated on their pivots 16 whereby the suction nozzle is operated to pick up a sheet from the pile and transfer it to the feed table. 18, i8 denote elements which assist in the operation of the suction nozzle as set forth in the application 449,421. 19 is the pump pivoted at 20. A hose 21 connects the pump with the suction mechanism at 22.

suitably pivoted at 23 near the door are tivo levers 24, one on each side. Through their pivot at- 23 their lower ends are connected and at the top they are connected by the gripper carriage 25 which carries one or more pair of grippers'26. The one lever 24 has an arm 27 to which is connected a bent link 28 which is pivoted to the operating rod 7 on the far side of the press, Whereby,`during the operation of the press the levers 24 are oscillated on their pivot 23. The levers 24 abut the rod 17 to operate the grippers toward the platen as shown and the levers 24 also carry a spring 29 the other end of which is secured to the rod 17 on the levers 15, whereby, when the levers 24 are moved to the left the upper ends of the levers 15 are moved to the right. ln other Words, it will be clear that the grippers and the suctionseparating mechanism atv 12 are operated in opposite directions by the levers 24 which in turn are operated by the rod 28 pivoted on Vconnecting rod 7. The detailed construction and operation of the grippers are described inmy Patent, Number 1,025,418. i

30 is the feed table which is pivotedfjat 3l ually operated tripping mechanism, the press.

is provided with an automatic trip, described and claimed in my pending application seriall f numbered 418,021, and the main features o which comprise a contact plate 39 and a pivoted contact 40 both carried by the feed table. On the left side of the ress is the usual platen locking cam 41 an the said pivoted Contact 40 is operated from the said cam through the levers 42, to 46 inclusive in such a manner that if a sheet fails to be placed on the feed table by the suction rod 7 and as thelatter moves to the right.,l `the lever 49 through the latch carries the trip lever along and trips the press as shown. Thus provision 'has been made for trip ping the press when the suction means fail to operate or the sheet is fed by said means into an improper position on the feed table 30. It happens, however, sometimes that after the sheet has been transferred to the platen, it becomes crumpled or otherwise is put into an improper position, so that it cannot be seized by the grippers and delivered but remains on the platen and spoils the succeeding sheets. To overcome this trouble l have devised means whereby when no sheet is seized by the gripper-s' these'latter .bly the closing of the gripper jaws, close an ctric circuit which trips not. alone 4the ress but also the suction means to prevent urther sheets from being fed to the table and from lthence to the platen, and thus pre-' vents a number of crumpled sheets from be-v ing massed upon the platen and cause injur to the tympan and the form. To this end have placed upon one of the gripper 'aws a properly insulated contact; 51, see g. 2,

' and upon the pump 19 there is mounted 'a.

magnet 52. The pump is provided with a hole 53 leading to the atmosphere and which l is normally covered by a swinging cover 54.

A spring 55 on the cover pivot tends to swing the cover to the right in Fig. 2 to uncover the hole, but is prevented from doing at once, the suction means vwould kee 4plhng up the sheets `en the table and*l m soy by the magnet armature 56 pi-voted at 57. When the magnet is energized-the armature l1s raised and the cover 54 is swung by the spring 55 in under the magnet and the hole 53 1s uncovered. LBy referring to Fig. 2 it will be seen that 58 is the battery or source of electrical power and which is connected to the two lmovable contacts, 51 on the grippers and 40 on the -feed table. AThe battery .l 1s alsol connected to the magnet '52 on thev 75 pump and the magnet 47 on the trip lever. The other side of the magnets are ground on the machine indicated by the wires 60. Dur ing the operation of the press there-are always three sheets separated from theipile. O ne is in the act of being lifted lfrom the pile by the suction means 12, the second is lying on the feed table and the third iis on the platen, and each sheet during its passage through the press must ass between contacts 39 and 40 and be seize by the f pers. Now, if the sheet is not between t e contacts 39 and 40 when these are mechanically brought together the press will' be tripped as vwe have seen and the magnet 52 90 will also be energized and the suction means i will be tripped too, due to the uncovering'.-

of the hole 53. A signal 61 is included in the circuit and when the press trips, the sig- .L- nal operates and the operator will then attend the press, remove the sheet which causes the trouble and the circuit then o ens automatically when the contacts 39 an 40 are again separated mechanically. The o erator also swings the cover 54 back over tige 100 hole 53 and the larmature 56 falls in behind the cover. If the grippers cannot seize the; sheet, contact is made by the closing of the jaws and again the circuit will be closed and the press tripped. The grippers open 'automaticallv when they reachv the position Ishown in Fig. 1.

Thus it will be clear thatA if for any rea?, A son a sheet is misplaced either on the feed .l table or o`n the platen, the press and the Suction means are tri ped to preventimprop'er i printing4 and the eeding of more sheets on.- topfof those imp'roperlyyplaced. The advantage of tripping the suction means 'will be apparent when it is considered that if the operator cannot attend to the tripped press there to the platen and thus many sheets might be wasted and the frm might 'be izo", spoiled. A .Changes in the detailed construction of course be made within the spirit of invention and the scope of the ap 1 clalms.

I claim: Y Y 1. In a printing press the combn 'on suction means for separating thefs eets, pump for supplyingv the suction-.10.1, means, a platen,l mechanism "forv len1ovlti'ar f e upon ie si. of said 5 ermin Le 15( @dering seid pump inacve. e. priitng prees he cembmen ef f1-ii ej means, a sheet I n pump, grip@ d sheet from sai@ priiiig means, le

: carried by seid grip-pele and deie apen the dosing of said terrendering the said pump inactive ie Seial separating means.

'printing pl'ess the combina-tion of reihig mechanism including e.

Y 1 @iz-cui@ ineung seid orelesing ciicu ine enei Qeid megne and means epemble by eer for opening communceien be tweeii the interim of sri-. pump and bhe ai 1 open eleetric circuit heving we nei en said Jump e nermay:

mesphere to ienfe saif sh mechanism inactive,

En e printing press the een` a sheet separating mecheniem pump, a megne: on' said'mp mechanism minding a, seco? nomely open electric beth of vsaidmeg1f1es seid circuit tof enen1 magnets and ce'vifw when the seid zlendeing said pump ii ehee separating mei ing the said` tripping sa press.

Swed im W 'ei-vare? 

